The Hellenic Navy (HN) (Greek: Πολεμικό Ναυτικό, Polemikó Naftikó, abbreviated ΠΝ) is the naval force of Greece, part of the Greek Armed Forces. The modern Greek navy has its roots in the naval forces of various Aegean Islands, which fought in the Greek War of Independence. During the periods of monarchy (1833–1924 and 1936–1973) it was known as the Royal Navy (Βασιλικόν Ναυτικόν, Vasilikón Naftikón, abbreviated ΒΝ).The total displacement of all the navy's vessels is approximately 150,000 tons.The motto of the Hellenic Navy is "Μέγα το της Θαλάσσης Κράτος" from Thucydides' account of Pericles' oration on the eve of the Peloponnesian War. This has been roughly translated as "Great is the country that controls the sea". The Hellenic Navy's emblem consists of an anchor in front of a crossed Christian cross and trident, with the cross symbolizing Greek Orthodoxy, and the trident symbolizing Poseidon, the god of the sea in Greek mythology. Pericles' words are written across the top of the emblem. "The navy, as it represents a necessary weapon for Greece, should only be created for war and aim to victory."...............The Hellenic Merchant Marine refers to the Merchant Marine of Greece, engaged in commerce and transportation of goods and services universally. It consists of the merchant vessels owned by Greek civilians, flying either the Greek flag or a flag of convenience. Greece is a maritime nation by tradition, as shipping is arguably the oldest form of occupation of the Greeks and a key element of Greek economic activity since the ancient times. Nowadays, Greece has the largest merchant fleet in the world, which is the second largest contributor to the national economy after tourism and forms the backbone of world shipping. The Greek fleet flies a variety of flags, however some Greek shipowners gradually return to Greece following the changes to the legislative framework governing their operations and the improvement of infrastructure.Blogger Tips and Tricks
This is a bilingual blog in English and / or Greek and you can translate any post to any language by pressing on the appropriate flag....Note that there is provided below a scrolling text with the 30 recent posts...Αυτό είναι ένα δίγλωσσο blog στα Αγγλικά η/και στα Ελληνικά και μπορείτε να μεταφράσετε οποιοδήποτε ποστ σε οποιαδήποτε γλώσσα κάνοντας κλικ στη σχετική σημαία. Σημειωτέον ότι παρακάτω παρέχεται και ένα κινούμενο κείμενο με τα 30 πρόσφατα ποστς....This is a bilingual blog in English and / or Greek and you can translate any post to any language by pressing on the appropriate flag....Note that there is provided below a scrolling text with the 30 recent posts...Αυτό είναι ένα δίγλωσσο blog στα Αγγλικά η/και στα Ελληνικά και μπορείτε να μεταφράσετε οποιοδήποτε ποστ σε οποιαδήποτε γλώσσα κάνοντας κλικ στη σχετική σημαία. Σημειωτέον ότι παρακάτω παρέχεται και ένα κινούμενο κείμενο με τα 30 πρόσφατα ποστς.........

Thursday, December 25, 2014

The Navy's new super stealthy destroyer,.[ 5067 ]

Navy's stealth destroyer designed for the video gamer generation

Source: CNN



(CNN) -- The Navy's new super stealthy destroyer, the USS Zumwalt, has a lot in common with Hollywood's starship Enterprise, according to folks who've seen it in person.

Much has been written about the Zumwalt's appropriately named commander, Capt. James Kirk. But aside from that coincidence, the ship's operations center utilizes advanced technology that takes multitasking to a deadly new level on the high seas.

First launched last year, this is a massive $3 billion warship -- the largest type of destroyer in the modern Navy by about 65%. One thing that sets it apart is a very small crew.

Compared with about 300 sailors needed for similar warships, the Zumwalt's minimum compliment is only 130.

 

 
Pentagon's platform for stealth dirt bike

The smaller crew is made possible by advanced automated systems which "make it much easier and much more effective for the sailor to operate," says former Navy Capt. Wade Knudson, who now serves as Zumwalt program director for Pentagon contractor, Raytheon.

In the operations center -- which in many ways is the heart of the ship -- sailors are surrounded by an array of video displays that have been designed to be used by a generation raised on video games, Knudson says.

Raytheon tested the technology configuration in the operation center with young, gamer sailors, Knudson says. "We've brought them down to our labs and we got direct feedback from them using human-factor engineers in order to make sure that we've integrated all the displays and information in a way that they can use the systems most effectively."

The result, he says, is less chance of making errors on the ship. "The system and the computer provide information to the sailor in a way that they're used to."

Work stations inside the center are outfitted with three common displays, Knudson says. "You can sit down at any of the systems and operate them."

A Raytheon mock-up of a Zumwalt operations center roughly similar to the facility aboard the Navy\'s newest destroyer.
A Raytheon mock-up of a Zumwalt operations center roughly similar to the facility aboard the Navy's newest destroyer.

At 610 feet long and 80 feet wide, the Zumwalt is about 100 feet longer and 20 feet wider than ships in the Navy's current fleet of Arleigh Burke-class destroyers featured in the action-packed 2012 film "Battleship."

Although it's huge, the Navy says this thing is surprisingly stealthy.

Much of the ship is built on angles that help make it 50 times harder to spot on radar than an ordinary destroyer. "It has the radar cross-section of a fishing boat," Chris Johnson, a spokesman for Naval Sea Systems Command, told CNN last year.


Sean Gallagher, of the self-described "alpha geek" website Ars Technica, got a chance last year to explore a mockup of the Zumwalt's operation center. The workstations are part of the ship's Common Display System -- nicknamed "keds" for short, Gallagher reported.

Sailors operate keds with "trackballs and specialized button panels," Gallagher reported. Operators have an option to interface by using touchscreens, if they prefer, according to Gallagher.

The whole operations center technology array saves manpower by allowing sailors to monitor multiple weapons systems or sensors, Gallagher reported. The Zumwalt, Gallagher wrote, also includes limited wireless networking capability.


The way all the ship's weapons, radar and other systems are displayed to users and the captain, Knudson told CNN, "it really give them unprecedented situational awareness."

The Zumwalt is about 100 feet longer than older Arleigh Burke-class destroyers like this one, the USS Ramage.
The Zumwalt is about 100 feet longer than older Arleigh
.
 Burke-class destroyers like this one, the USS Ramage.

"That ability is truly going to be a game-changer."

In its current configuration, the Zumwalt will carry a considerable arsenal of weapons, including two Advanced Gun Systems (AGS), which can fire rocket-powered, computer-guided shells that can destroy targets 63 miles away. That's three times farther than ordinary destroyer guns can fire.

But one day it could be fitted with advanced weapons systems that are currently experimental, including a laser weapon and an electromagnetic railgun.

Electromagnetic railguns don't need to fool around with needless explosive warheads or propellants. These fearsome weapons inflict damage by sheer speed. The gun uses electromagnetic force to blast a missile 125 miles at 7.5 times the speed of sound, according to the Navy.

The laser weapon -- which could be fired by one sailor on a video game-like console -- is designed to take on aircraft or small surface vessels.

Currently undergoing sea testing, Knudson says the Zumwalt is expected to join the rest of the Navy fleet sometime in 2016

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